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Service Workers
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service-workers.md

Service Workers

A service worker is a script that is run by your browser in the background, separate from a web page, opening the door to features which don't need a web page or user interaction. Rich offline experiences, periodic background syncs, push notifications— functionality that would normally require a native application—are coming to the web.

  • SW are are just JS workers, so they can't access the DOM directly
  • a SW can communicate w/ the pages it controls by responding to message sent via the postMessage interface
  • SW is a programmable network proxy, allowing you to conrol how network requests from your page are handled
  • it runs only when needed, and terminiates when unneeded (cannot rely on global state)
  • service workers make extense use of promises

SW Lifecycle

  • to install a SW, you need to register it in your page's JS

sw-lifecycle

Resources

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